High-tech problemsHas your computer ever gotten a glitch or a virus, causing it to freeze up, run extremely slow, or get the "blue screen of death"? Most people have experienced something like this at one time or another, but apparently Ray Kurzweil never has. His faith in technology is so complete, so blinded by love, that he actually dreams of a day when we can remove all our natural red blood cells from circulation, and replace them with "more efficient" nanotechnology robots, which will not only deliver oxygen, but perform other helpful functions as well.I don't doubt that medical science will continue to amaze us all with new developments, including in vivo nano-bots one day, but Kurzweil's vision looks more reckless than appealing. Maybe Kurzweil should consider the following scenerio:====================================TS:Welcome to Bio-nano-dyne Tech Support... (in a thick Indian accent) my name is Kevin, how can I help you?Kurzweil: Uh...yeah...my name is Ray Kurzweil... I just replaced all my natural red blood cells with your OxygenMaster 3000 (TM) cells, and I don't feel so good. I'm sweating in buckets, my piss is green, and I have double.. make that triple.. vision.TS: Oh, I think I can help you, Sir... Let me ask you: do you have a Jarvik 6 heart?Kurzweil: Yeah, but it's never been a problem before.TS: Oh yes... we've discovered a slight glitch in the OxygenMaster 3000 (TM) series when used with the Jarvik 6 heart, but don't worry, we've corrected it! You'll just have to install a patch. Have you been to our website?Kurzweil: Oh God, can you please call me an ambulance?!?TS: After you install the patch, you'll have to reboot the system. Do you have a friend with you, and a set of defibrillator paddles?...=====================================There's nothing wrong with dreaming big- in fact, that seems to be what Kurzweil is paid for, but his dreams appear to be untempered by caution or skepticism. Should I really be excited about replacing all my organs with proprietary technology? And how much is all this going to cost? And who's going to pay for it? This isn't for youThe prospect of living forever is exciting, but don't rush out and get a 3500 year mortgage on your house just yet. It should be obvious that not everybody will be able to afford Kurzweil's life-extension program. So where are these developments heading? A two-tiered society composed of wealthy semi-immortals, and short-lived poor? Even if life-extending technologies were distributed justly, what would happen to society if people suddenly started to live for 2500 years? (Kurzweil throws that number out there, but later says that life may be able to be extended indefinitely) And it wouldn't be just any people living 2500 years, it would specifically be the super-rich. Imagine how much more difficult it would have been to abolish slavery in the U.S. if a large fraction of the wealthiest Americans were 2500-year-olds who had owned slaves back in the days of ancient Greece and the Roman Empire.This isn't for youOne doesn't need to contemplate the implications of this book for long to realize it would be truly terrifying if Kurzweil's vision comes to pass. Time is the biggest commodity you need to get rich. Extended life would make the super-rich richer (and the poor poorer). What's worse: simple arithmetic demonstrates what a population problem we'd have if a lot of people started living 2500 years or more. The result would force a lot of hard questions on the public about limits on childbearing, euthenasia, maybe mandatory life limits, etc. The debate would be driven by super-wealthy in a position to influence both the media and public policy makers. It seems likely that they would conclude that the super-rich immortal are entitled to their demigodhood, and the rest of us should somehow suck it up, either by having fewer kids, and/or by accepting lower and lower lifespans. The magazine "H+" (which stands for "Humanity +", a reference to the enhanced humans Kurzweil wishes to create) hints at two possible approaches to this problem: 1) replace real sex with cybersex; or 2) bioengineering ways to make the sex act neurologically displeasurable to the general population. Gee, where have I heard that before? So, to enable our political and financial Elite to obtain immortality, we all have to become celibate? I guess progress has its price.This isn't for youKurzweil is smart to steer clear of the social questions in this book, and to stick to the scientific aspects of his "fantastic voyage". If you look to outside sources, you can learn that he is well aware of the social issues, and has no problem with the two-tiered society I've described. You can check out an interview in which he imagines the "unenhanced" will be as bacteria to biogenetic/nanotech modified superhumans. This isn't for youI am certainly onboard with reducing human sufferring, and giving people longer, more productive lives. Fantastic Voyage, however, is not about that at all. It is the basis for an envisioned social system which would be inequitable by intention. In fact, by necessity, it is about giving some people (i.e. most of us) shorter, less fulfilled lives (if you consider children in your life to be a blessing, if you enjoy real sex with real partners, or if you do not wish to reengineer the orgasm into an unpleasant experience). From a biologic standpoint, Kurzweil's ambitions possess a hubris on the level of Icarus. Unless we plan on agressively colonizing space in the next few decades, I do not see how his vision can end in anything but extreme injustice.Edit: More about all this from Manny